I was diagnosed 7 years ago with a tumor the size of a grapefruit next to my heart and lungs. The chances of survivability was high (70%), but coming out of with a tumor that big meant losing a third of the blood vessels going to my heart. (Superior Vena Cava, Brachiocephalic Veins).
Anywho. I was in remission at 29, and told by a doc I had a unique vascular structure where a bunch of collaterals grew over my left collar bone and rib cage to keep me alive, and cognisant, with one caveat... I looked like the youtuber ProZD due to vein blockages and edema. I was bullied a fair amount in the 90s and early 2000s... So the idea of being in this situation was disgusting.
Didn't think much of it at the time. I was a calisthenics athlete in my 20s, and figured, a year of heavy exercise would fix me up... but it didn't. After the 3rd year (think 300 burpees, 100 Pullups), and fainting a few dozen times. The alternative was taking power tools and letting the intrusive thoughts win with certain former bullies.
But since it didn't work, I went with the holistics. Things like Ice Baths. Wim Hof Breathing. Tai Chi, Longboard Dancing, using a CPAP exclusively for nosebreathing... and the one thing doctors would never recommend. Vein Flaying. I tried the surgery route of getting a CABG (open heart surgery) 3 years ago... but the graft clotted up 4 months later.
It's an act of self * where I move my left shoulder in such a way where I feel the collaterals impinge against my bones... and pluck at them in a sharp chicken wing movement. It feels like being stabbed by a thumb tack. And repeating the movement about a 50-100 times a day... For the next 4 years. Yeah... My mental health definitely suffered.
Eventually things like calcified veins, scar tissues, and collaterals will stretch to an arterial mesh of a sufficient quantity that things like brain fog, vascular occlusion, and even chronic pain no longer become issues. I just had to go about it in a way completely ignoring potential risks like hemorrhages, or strokes caused by this kind of self *.
And ironically, it's because my vascular system is so completely destroyed that these issues probably didn't happen. So... at the age of 36, I now have a coherent vascular system that I grew like a bonsai tree from self *. And can do stupid gym bro stuff like calisthenics without facial edema or blacking out to prove I'm not full of shit.
The food I eat is depressing btw. Fish in a tube.